Q. What kind of steel box is it?

Answer

Here are the top best types of steel boxes:Standard rectangular boxes: To accommodate a single light switch or outlet receptacle, a standard rectangular box is utilized. This type of box is often referred to as a "single-gang" or "one-gang" box.Round pan Electrical boxes: Pancake pans, or round pans, are shallow circular enclosures often used for light fixtures weighing less than 50 pounds that are installed on the ceiling or wall.Octagon and Round Electrical Boxes: In surface-mounted systems, metal boxes can be used with metal conduits. In retrofit or "old work" situations, it is common to see "ears" on the back of a spherical plastic box for attaching it to the surrounding surface.